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OpenStudy (anonymous):
If ln x + ln(x-4)= ln4x, then x= ?? The answer is 8...but can anyone help and show the working out?
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OpenStudy (anonymous):
lna+lnb=ln(ab)
OpenStudy (anonymous):
lna=lnb => a=b
OpenStudy (lgbasallote):
Product Law... ln x(x-4) = ln4x e^ln4x = x(x-4) 4x = x(x-4) divide both sides by x.... 4 = x - 4 x = 8
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